Commoner, Barry
Knopf, 1979.
Buku Teks
Willrich, Mason
The Free Press, 1975
Buku Teks
Barry, Tom
Grove Weidenfeld, 1991
Buku Teks
Saddler, Hugh.
George Allen & Unwin Australia,, 1981
Buku Teks
Allouche, Jeremy, author
Routledge, Taylor & Francis Group, 2019
Buku Teks